Flat knitting frame



March 4, 1930. R. GRAEBER FLAT KNITTING FRAME Filed Sept. 24. 1926 fzzvejz for:

' Patented Mar. 4,

UNITE-u STATES PATENT OFFICE RUDOLPH GRA EBER, OF CHEMNITZ, GERMANY, A SSIGNOR TO SCHUBERT -& S ALZER MASGHIN-ENEABRIK AKTIENG-ESELLSCHAFT, OF CHEMNITZ, GERMANY I FLAT KNITTING FRAME Application zflled September 24, 1926, Seria1 No. 137,585fand in Germany September 1, 1925.

, I My invention relates -to fiat knitting k frames provided with means for altering the stroke of the slurcocks in accordance with ,the width of the fabric to be made. By this 5 means a. substantialincrease in the output of flat knitting frames is obtained.

Instead 'of guiding the slurcocks in the usual manner of manufacture of stockings always over the whole width of the-fabric 19 regardless whether a welt is made or during the manufacture of the narrowed length or the tip of the stocking only a part of the sinkers is operative for sinking the loops, the stroke of the slurs is according to the i 15 invention altered to correspond to the width as the slurcocks are actually required to travel in manufacturing the fabric. I

' 'At the end of the stroke of the slurcocks necessary for carrying out the knitting process, the slurcocks must. be moved out of the working line in order that the sinkers may be retracted.

. This alteration of position is required. by reason of the fact that the. slurcocks are not moved beyond the end of the sinker bed, the extent of movement of the slurcocks being -regulatable to conform approximately to the width of the fabric. 1

In the accompanying drawing one mode of'carrying out the invention is shown dia- 40 grammatically in plan view.

The slur bar 1 carries the slurcocks 2 and is moved by the cam 3. This earn 3 which is diagrammatically illustrated, cooperates with an arm 4 of a bell crank lever pivotally mounted at 5 on the frame of the knitting machine. The other arm 6 of the bell crank lever is providedwith a slot 7-. A lever 9 pivoted at--8 is connected to the 'slur. bar 1. Pivotally connected to the lever 9 is a rod .10 the free end of which carriesa guide block 11 sliding in the slot 7. An arm 13 of a double lever. 13, pivoted at 12 is con- .nected by means of an intermediate rod 14 to the rod 10. The other arm 15 of the double lever 13, 15 is formed as a handle. Below the arm 15 anadjustment scale is provided.

The slurcocks 2 are ,slidable in guides 17 extensions of which serve as bearings for a rod 18. In the'level of each slurcock the rod 18 is provided with a crank 19 which is connected to the slurcock 2 by means of a rod 20.

A toothed drum 21 is arranged at the end of the bar 18 opposite the mechanism. for

shifting the slur bar 1. Pivotally mounted in '7 the frame of the lmitting machine is a rack" 22 which engages the drum 21. The drum 21 is of such a length that, ,even if the slur' bar 1 is shifted longitudinally to the end of either stroke, the rack 22 will engage the teeth of the drum 21.

The rack 22 is moved by acam 23 cooperating'with an arm 24 of a bell crank lever 24, 26 pivoted at 25. The arm 26 of the bell crank lever 24, 26 is connected to the rack 22 by means of a rod 27. An arm 28 provided at the bell crank lever 24, 26 is pivotallyconnected to a rod 29. The rod 29 cooperates with bell crank levers 30 through which by means of guide rods 31 the'bar 32 is moved. The jack sinkers are designatedv 33. Bar 32 serves to return the sinkers after they have been advanced by the slurcocks in the usual manner.

.The slur bar 1 is reciprocated in the known manner by rotating the .cam 3. If the stroke of the slurcocks is to be altered the handle 15 is adjusted, wherebythe position of the guide block 11 of thebar 10 in the slot 7 is altered. According to the alteration of the effective length of the arm 6, the slur bar 1 and therefore the slurcocks 2 are moved over correspondingly longer or shorter distances. v

The'reduction of the slur bar stroke prevents moving the slurcocks beyond the end of the sinker bed 32. It would therefore be 33 out of ,their working position. The cam impossible for the bar 32 to press the sinkers 23, however, shifts the rack 22 so that the 4 toothed drum 21 is rotated and the slurcocks 2 are moved out of their working position by means of the cranks 19 of the rod 18. 5 On account of the connection between the movement of the bar 32 and the rack 22, the bar 32 may freely press back the sinkers 33 after the slurcocks 2 have been retracted.

What I claim is: 1 v 1. In a flat knitting machine having a plurality of sinker beds and slurcocks for operating at the respective sinker beds, the combination with means to drive the said slurcocks, of means for adjusting the said driving means to vary the extent to which the slurcocks are driven and thereby the number of sinkers operated in" any given bed. 2. Ina flat knitting machine having a plurality of sinker beds and slurcocks for operating at'the respective sinker beds, the combination with means to drive the said slurcocks, of means for'adjusting the said driving means to vary the extent to which the slurcocks are driven and thereby the number of sinkers operated in any given bed and means for retracting the slurcocks at the end of the driving movement thereof to permit the withdrawal of the sinkers from the working linen In testimony whereof I afli'x my signature;

' RUDOLPH GRAEBER. 

